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Hisun 800 no spark


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HI All,

I have an 800cc Hisun fuel injected twin cylinder. Im trying to diagnose a no spark issue.  I had a bad crank sensor, replaced that and still got no spark and yes i doubled check the new one to make sure it was good.  Checked the both coil packs and they are both receiving power, also checked the resistance and both seem to be good.  It seems to me like the ECU is not sending the signal to the Coil packs.  Anyone have any idea how to test the ECU?  Any help or advice would be appreciated.  Thanks

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It has two coil packs, one for each cylinder and a crank position sensor.  I have already replaced the crank position sensor and double checked the ohm readings.  I have also checked the Coil packs and they both have identical resistance readings.  I cannot find a value for the coil packs but since they both read identically I'm leaning tword them being ok.  I also have 12v to the wires connecting to them.  

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Does the vehicle have more than one relay? On most cars, if there's more than one, you can interchange them from a known working circuit. 

It's been a few years, but I'm pretty sure that they can be tested fairly easily. I've always had good luck using the above method for diagnosis. 

I'd certainly want to eliminate all other possible causes before putting out the money for a new processor. 

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Just wanted to give update . It was the ecm. Put new one on and got spark immediately to front cylinder.  Ran but smoking and no power. I checked back cylinder and no fire. Pulled coil to check with meter and found wire was not getting good connection where it plugs into coil. All good now . She will scream !!!. Next is to figure out why 4x4 switch wont turn.  Thanks for all the imput....

 

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